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1/*2 * Copyright 2011 Red Hat, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * on the rights to use, copy, modify, merge, publish, distribute, sub8 * license, and/or sell copies of the Software, and to permit persons to whom9 * the Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice (including the next12 * paragraph) shall be included in all copies or substantial portions of the13 * Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.21 */22 23#include <linux/delay.h>24 25#include <trace/events/dma_fence.h>26 27#include "qxl_drv.h"28#include "qxl_object.h"29 30/*31 * drawable cmd cache - allocate a bunch of VRAM pages, suballocate32 * into 256 byte chunks for now - gives 16 cmds per page.33 *34 * use an ida to index into the chunks?35 */36/* manage releaseables */37/* stack them 16 high for now -drawable object is 191 */38#define RELEASE_SIZE 25639#define RELEASES_PER_BO (PAGE_SIZE / RELEASE_SIZE)40/* put an alloc/dealloc surface cmd into one bo and round up to 128 */41#define SURFACE_RELEASE_SIZE 12842#define SURFACE_RELEASES_PER_BO (PAGE_SIZE / SURFACE_RELEASE_SIZE)43 44static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE };45static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO };46 47static const char *qxl_get_driver_name(struct dma_fence *fence)48{49 return "qxl";50}51 52static const char *qxl_get_timeline_name(struct dma_fence *fence)53{54 return "release";55}56 57static long qxl_fence_wait(struct dma_fence *fence, bool intr,58 signed long timeout)59{60 struct qxl_device *qdev;61 unsigned long cur, end = jiffies + timeout;62 63 qdev = container_of(fence->lock, struct qxl_device, release_lock);64 65 if (!wait_event_timeout(qdev->release_event,66 (dma_fence_is_signaled(fence) ||67 (qxl_io_notify_oom(qdev), 0)),68 timeout))69 return 0;70 71 cur = jiffies;72 if (time_after(cur, end))73 return 0;74 return end - cur;75}76 77static const struct dma_fence_ops qxl_fence_ops = {78 .get_driver_name = qxl_get_driver_name,79 .get_timeline_name = qxl_get_timeline_name,80 .wait = qxl_fence_wait,81};82 83static int84qxl_release_alloc(struct qxl_device *qdev, int type,85 struct qxl_release **ret)86{87 struct qxl_release *release;88 int handle;89 size_t size = sizeof(*release);90 91 release = kmalloc(size, GFP_KERNEL);92 if (!release) {93 DRM_ERROR("Out of memory\n");94 return -ENOMEM;95 }96 release->base.ops = NULL;97 release->type = type;98 release->release_offset = 0;99 release->surface_release_id = 0;100 INIT_LIST_HEAD(&release->bos);101 102 idr_preload(GFP_KERNEL);103 spin_lock(&qdev->release_idr_lock);104 handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);105 release->base.seqno = ++qdev->release_seqno;106 spin_unlock(&qdev->release_idr_lock);107 idr_preload_end();108 if (handle < 0) {109 kfree(release);110 *ret = NULL;111 return handle;112 }113 *ret = release;114 DRM_DEBUG_DRIVER("allocated release %d\n", handle);115 release->id = handle;116 return handle;117}118 119static void120qxl_release_free_list(struct qxl_release *release)121{122 while (!list_empty(&release->bos)) {123 struct qxl_bo_list *entry;124 struct qxl_bo *bo;125 126 entry = container_of(release->bos.next,127 struct qxl_bo_list, tv.head);128 bo = to_qxl_bo(entry->tv.bo);129 qxl_bo_unref(&bo);130 list_del(&entry->tv.head);131 kfree(entry);132 }133 release->release_bo = NULL;134}135 136void137qxl_release_free(struct qxl_device *qdev,138 struct qxl_release *release)139{140 DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type);141 142 if (release->surface_release_id)143 qxl_surface_id_dealloc(qdev, release->surface_release_id);144 145 spin_lock(&qdev->release_idr_lock);146 idr_remove(&qdev->release_idr, release->id);147 spin_unlock(&qdev->release_idr_lock);148 149 if (release->base.ops) {150 WARN_ON(list_empty(&release->bos));151 qxl_release_free_list(release);152 153 dma_fence_signal(&release->base);154 dma_fence_put(&release->base);155 } else {156 qxl_release_free_list(release);157 kfree(release);158 }159 atomic_dec(&qdev->release_count);160}161 162static int qxl_release_bo_alloc(struct qxl_device *qdev,163 struct qxl_bo **bo,164 u32 priority)165{166 /* pin releases bo's they are too messy to evict */167 return qxl_bo_create(qdev, PAGE_SIZE, false, true,168 QXL_GEM_DOMAIN_VRAM, priority, NULL, bo);169}170 171int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo)172{173 struct qxl_bo_list *entry;174 175 list_for_each_entry(entry, &release->bos, tv.head) {176 if (entry->tv.bo == &bo->tbo)177 return 0;178 }179 180 entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL);181 if (!entry)182 return -ENOMEM;183 184 qxl_bo_ref(bo);185 entry->tv.bo = &bo->tbo;186 entry->tv.num_shared = 0;187 list_add_tail(&entry->tv.head, &release->bos);188 return 0;189}190 191static int qxl_release_validate_bo(struct qxl_bo *bo)192{193 struct ttm_operation_ctx ctx = { true, false };194 int ret;195 196 if (!bo->tbo.pin_count) {197 qxl_ttm_placement_from_domain(bo, bo->type);198 ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);199 if (ret)200 return ret;201 }202 203 ret = dma_resv_reserve_fences(bo->tbo.base.resv, 1);204 if (ret)205 return ret;206 207 /* allocate a surface for reserved + validated buffers */208 ret = qxl_bo_check_id(to_qxl(bo->tbo.base.dev), bo);209 if (ret)210 return ret;211 return 0;212}213 214int qxl_release_reserve_list(struct qxl_release *release, bool no_intr)215{216 int ret;217 struct qxl_bo_list *entry;218 219 /* if only one object on the release its the release itself220 since these objects are pinned no need to reserve */221 if (list_is_singular(&release->bos))222 return 0;223 224 ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos,225 !no_intr, NULL);226 if (ret)227 return ret;228 229 list_for_each_entry(entry, &release->bos, tv.head) {230 struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);231 232 ret = qxl_release_validate_bo(bo);233 if (ret) {234 ttm_eu_backoff_reservation(&release->ticket, &release->bos);235 return ret;236 }237 }238 return 0;239}240 241void qxl_release_backoff_reserve_list(struct qxl_release *release)242{243 /* if only one object on the release its the release itself244 since these objects are pinned no need to reserve */245 if (list_is_singular(&release->bos))246 return;247 248 ttm_eu_backoff_reservation(&release->ticket, &release->bos);249}250 251int qxl_alloc_surface_release_reserved(struct qxl_device *qdev,252 enum qxl_surface_cmd_type surface_cmd_type,253 struct qxl_release *create_rel,254 struct qxl_release **release)255{256 if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) {257 int idr_ret;258 struct qxl_bo *bo;259 union qxl_release_info *info;260 261 /* stash the release after the create command */262 idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release);263 if (idr_ret < 0)264 return idr_ret;265 bo = create_rel->release_bo;266 267 (*release)->release_bo = bo;268 (*release)->release_offset = create_rel->release_offset + 64;269 270 qxl_release_list_add(*release, bo);271 272 info = qxl_release_map(qdev, *release);273 info->id = idr_ret;274 qxl_release_unmap(qdev, *release, info);275 return 0;276 }277 278 return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd),279 QXL_RELEASE_SURFACE_CMD, release, NULL);280}281 282int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size,283 int type, struct qxl_release **release,284 struct qxl_bo **rbo)285{286 struct qxl_bo *bo, *free_bo = NULL;287 int idr_ret;288 int ret = 0;289 union qxl_release_info *info;290 int cur_idx;291 u32 priority;292 293 if (type == QXL_RELEASE_DRAWABLE) {294 cur_idx = 0;295 priority = 0;296 } else if (type == QXL_RELEASE_SURFACE_CMD) {297 cur_idx = 1;298 priority = 1;299 } else if (type == QXL_RELEASE_CURSOR_CMD) {300 cur_idx = 2;301 priority = 1;302 }303 else {304 DRM_ERROR("got illegal type: %d\n", type);305 return -EINVAL;306 }307 308 idr_ret = qxl_release_alloc(qdev, type, release);309 if (idr_ret < 0) {310 if (rbo)311 *rbo = NULL;312 return idr_ret;313 }314 atomic_inc(&qdev->release_count);315 316 mutex_lock(&qdev->release_mutex);317 if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) {318 free_bo = qdev->current_release_bo[cur_idx];319 qdev->current_release_bo_offset[cur_idx] = 0;320 qdev->current_release_bo[cur_idx] = NULL;321 }322 if (!qdev->current_release_bo[cur_idx]) {323 ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority);324 if (ret) {325 mutex_unlock(&qdev->release_mutex);326 if (free_bo) {327 qxl_bo_unpin(free_bo);328 qxl_bo_unref(&free_bo);329 }330 qxl_release_free(qdev, *release);331 return ret;332 }333 }334 335 bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);336 337 (*release)->release_bo = bo;338 (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx];339 qdev->current_release_bo_offset[cur_idx]++;340 341 if (rbo)342 *rbo = bo;343 344 mutex_unlock(&qdev->release_mutex);345 if (free_bo) {346 qxl_bo_unpin(free_bo);347 qxl_bo_unref(&free_bo);348 }349 350 ret = qxl_release_list_add(*release, bo);351 qxl_bo_unref(&bo);352 if (ret) {353 qxl_release_free(qdev, *release);354 return ret;355 }356 357 info = qxl_release_map(qdev, *release);358 info->id = idr_ret;359 qxl_release_unmap(qdev, *release, info);360 361 return ret;362}363 364struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev,365 uint64_t id)366{367 struct qxl_release *release;368 369 spin_lock(&qdev->release_idr_lock);370 release = idr_find(&qdev->release_idr, id);371 spin_unlock(&qdev->release_idr_lock);372 if (!release) {373 DRM_ERROR("failed to find id in release_idr\n");374 return NULL;375 }376 377 return release;378}379 380union qxl_release_info *qxl_release_map(struct qxl_device *qdev,381 struct qxl_release *release)382{383 void *ptr;384 union qxl_release_info *info;385 struct qxl_bo *bo = release->release_bo;386 387 ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_MASK);388 if (!ptr)389 return NULL;390 info = ptr + (release->release_offset & ~PAGE_MASK);391 return info;392}393 394void qxl_release_unmap(struct qxl_device *qdev,395 struct qxl_release *release,396 union qxl_release_info *info)397{398 struct qxl_bo *bo = release->release_bo;399 void *ptr;400 401 ptr = ((void *)info) - (release->release_offset & ~PAGE_MASK);402 qxl_bo_kunmap_atomic_page(qdev, bo, ptr);403}404 405void qxl_release_fence_buffer_objects(struct qxl_release *release)406{407 struct ttm_buffer_object *bo;408 struct ttm_device *bdev;409 struct ttm_validate_buffer *entry;410 struct qxl_device *qdev;411 412 /* if only one object on the release its the release itself413 since these objects are pinned no need to reserve */414 if (list_is_singular(&release->bos) || list_empty(&release->bos))415 return;416 417 bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo;418 bdev = bo->bdev;419 qdev = container_of(bdev, struct qxl_device, mman.bdev);420 421 /*422 * Since we never really allocated a context and we don't want to conflict,423 * set the highest bits. This will break if we really allow exporting of dma-bufs.424 */425 dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock,426 release->id | 0xf0000000, release->base.seqno);427 trace_dma_fence_emit(&release->base);428 429 list_for_each_entry(entry, &release->bos, head) {430 bo = entry->bo;431 432 dma_resv_add_fence(bo->base.resv, &release->base,433 DMA_RESV_USAGE_READ);434 ttm_bo_move_to_lru_tail_unlocked(bo);435 dma_resv_unlock(bo->base.resv);436 }437 ww_acquire_fini(&release->ticket);438}439 440